Biological Evolution: Unity and Diversity
- Fossils
One of the earliest meat-eating mammals was saber-toothed
Millions of years before the evolution of saber-toothed cats, a newly discovered "hypercarnivore" prowled the forests of what is now San Diego.
- Health & Medicine
Sickle-cell gene therapies offer hope — and challenges
Doctor Erica Esrick discusses existing treatments and an ongoing clinical trial for a gene therapy to treat sickle cell disease.
- Animals
The end of the dinosaurs appears to have come in springtime
Fish fossils from North Dakota suggest when the Chicxulub asteroid devastated Earth, triggering the mass extinction of dinosaurs and other species.
- Life
Explainer: What is an endangered species?
Threats such as climate change and habitat loss can put species at risk of going extinct. Different words describe that risk.
- Fossils
Dinos may have had the sniffles 150 million years ago
A respiratory infection that spread to air sacs in the vertebrae of a sauropod dinosaur likely led to the dino's now-fossilized bone lesions.
- Animals
Newfound ‘bambootula’ spider lives inside bamboo stems
A YouTuber discovered a new tarantula genus living in bamboo near his home in Thailand. It’s the only tarantula known to choose such a habitat.
- Archaeology
Our species may have reached Europe while Neandertals were there
Archaeological finds from an ancient French rock-shelter show periodic settlements by both populations, just not at the same time.
- Animals
A new drug mix helps frogs regrow amputated legs
The treatment helped frogs grow working limbs useful for swimming, standing and kicking. It’ll be a while before people can do that.
- Animals
See the world through a jumping spider’s eyes — and other senses
Scientists are teasing out the many ways the spiders’ vision, listening and taste senses differ from ours
- Animals
Mysterious kunga is the oldest known human-bred hybrid animal
People bred these animals — part donkey, part wild ass — some 4,500 years ago, probably for use in fighting wars.
- Animals
Scientists discover the first true millipede
The newfound deep-living species tunnels belowground using a whopping 1,306 legs!
- Animals
As the tropics warm, some birds are shrinking
Migratory birds are getting smaller as temperatures climb, studies had showed. New evidence shows dozens of tropical, nonmigratory species are, too.
